Bio-inspired smart hydrogel with temperature-dependent properties and enhanced cell attachment
Young-Jin Kim1, Misa Tachibana, Mitsuo Umezu
1Center for International Research on Integrative Biomedical Systems (CIBiS), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan. mat@iis.u-tokyo.ac.jp.
Journal of Materials Chemistry. B
|April 9, 2020
Summary
Researchers developed smart hydrogels using temperature-responsive poly(N-isopropylacrylamide) (PNIPAAm) and mussel-inspired catechol groups. These biomaterials enhance stiffness and promote cell attachment for tissue scaffold applications.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Polymer Chemistry
Background:
- Stimuli-responsive hydrogels offer tunable properties like hydrophobicity, stiffness, and volume changes.
- Existing smart hydrogels lack sufficient biomimetic properties for advanced tissue engineering applications.
Purpose of the Study:
- To functionalize temperature-responsive poly(N-isopropylacrylamide) (PNIPAAm) hydrogels with catechol groups.
- To enhance hydrogel stiffness and promote cell attachment for biomaterial applications.
- To synthesize a novel dopamine methacrylamide (DMA) monomer for creating functional hydrogels.
Main Methods:
- Synthesis of a photo-crosslinkable dopamine methacrylamide (DMA) monomer.
- Fabrication of copolymer hydrogels via photo-polymerization of DMA and N-isopropylacrylamide (NIPAAm).
- Characterization of temperature-dependent properties, swelling behavior, and mechanical strength.
- In vitro cell culture studies to assess cell attachment and spreading.
Main Results:
- Successfully fabricated temperature-responsive smart copolymer hydrogels.
- The incorporation of DMA significantly influenced swelling behavior and compressive mechanical strength.
- Catechol groups in the hydrogels demonstrably promoted enhanced cell attachment and spreading.
Conclusions:
- The developed smart hydrogels exhibit controllable, temperature-dependent properties.
- Functionalization with catechol groups enhances mechanical properties and cell interactivity.
- These catechol-functionalized PNIPAAm hydrogels show significant potential as advanced biomaterials for tissue scaffolds.
